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endpointslice.go
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endpointslice.go
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package sources
import (
"time"
v1 "k8s.io/api/discovery/v1"
"github.com/overmindtech/discovery"
"github.com/overmindtech/sdp-go"
"k8s.io/client-go/kubernetes"
)
func endpointSliceExtractor(resource *v1.EndpointSlice, scope string) ([]*sdp.LinkedItemQuery, error) {
queries := make([]*sdp.LinkedItemQuery, 0)
sd, err := ParseScope(scope, true)
if err != nil {
return nil, err
}
for _, endpoint := range resource.Endpoints {
if endpoint.Hostname != nil {
// +overmind:link dns
queries = append(queries, &sdp.LinkedItemQuery{
Query: &sdp.Query{
Type: "dns",
Method: sdp.QueryMethod_SEARCH,
Query: *endpoint.Hostname,
Scope: "global",
},
BlastPropagation: &sdp.BlastPropagation{
// Always propagate over DNS
In: true,
Out: true,
},
})
}
if endpoint.NodeName != nil {
// +overmind:link Node
queries = append(queries, &sdp.LinkedItemQuery{
Query: &sdp.Query{
Type: "Node",
Method: sdp.QueryMethod_GET,
Query: *endpoint.NodeName,
Scope: sd.ClusterName,
},
BlastPropagation: &sdp.BlastPropagation{
// Changes to the node can affect the endpoint
In: true,
// Changes to the endpoint cannot affect the node
Out: false,
},
})
}
if endpoint.TargetRef != nil {
// +overmind:link Pod
queries = append(queries, ObjectReferenceToQuery(endpoint.TargetRef, sd, &sdp.BlastPropagation{
// Changes to the pod could affect the endpoint and vice versa
In: true,
Out: true,
}))
}
for _, address := range endpoint.Addresses {
switch resource.AddressType {
case v1.AddressTypeIPv4, v1.AddressTypeIPv6:
// +overmind:link ip
queries = append(queries, &sdp.LinkedItemQuery{
Query: &sdp.Query{
Type: "ip",
Method: sdp.QueryMethod_GET,
Query: address,
Scope: "global",
},
BlastPropagation: &sdp.BlastPropagation{
// Always propagate over IP
In: true,
Out: true,
},
})
case v1.AddressTypeFQDN:
// +overmind:link dns
queries = append(queries, &sdp.LinkedItemQuery{
Query: &sdp.Query{
Type: "dns",
Method: sdp.QueryMethod_SEARCH,
Query: address,
Scope: "global",
},
BlastPropagation: &sdp.BlastPropagation{
// Always propagate over DNS
In: true,
Out: true,
},
})
}
}
}
return queries, nil
}
//go:generate docgen ../docs-data
// +overmind:type EndpointSlice
// +overmind:descriptiveType Endpoint Slice
// +overmind:get Get a endpoint slice by name
// +overmind:list List all endpoint slices
// +overmind:search Search for a endpoint slice using the ListOptions JSON format: https://github.com/overmindtech/k8s-source#search
// +overmind:group Kubernetes
// +overmind:terraform:queryMap kubernetes_endpoints_slice_v1.metadata[0].name
// +overmind:terraform:scope ${provider_mapping.cluster_name}.${values.metadata[0].namespace}
func newEndpointSliceSource(cs *kubernetes.Clientset, cluster string, namespaces []string) discovery.Source {
return &KubeTypeSource[*v1.EndpointSlice, *v1.EndpointSliceList]{
ClusterName: cluster,
Namespaces: namespaces,
TypeName: "EndpointSlice",
CacheDuration: 1 * time.Minute, // very low since this changes a lot
NamespacedInterfaceBuilder: func(namespace string) ItemInterface[*v1.EndpointSlice, *v1.EndpointSliceList] {
return cs.DiscoveryV1().EndpointSlices(namespace)
},
ListExtractor: func(list *v1.EndpointSliceList) ([]*v1.EndpointSlice, error) {
extracted := make([]*v1.EndpointSlice, len(list.Items))
for i := range list.Items {
extracted[i] = &list.Items[i]
}
return extracted, nil
},
LinkedItemQueryExtractor: endpointSliceExtractor,
}
}
func init() {
registerSourceLoader(newEndpointSliceSource)
}